package com.tabview.difficultpoint;

import android.app.AlertDialog;
import android.app.Dialog;
import android.app.ProgressDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.os.Environment;
import android.os.Handler;
import android.os.Message;
import android.text.TextUtils;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.ProgressBar;
import android.widget.TextView;
import android.widget.Toast;

import com.xudow.app.Config;
import com.xudow.app.R;

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.text.DecimalFormat;

import static com.xudow.app.util.LogUtils.LOGE;
import static com.xudow.app.util.LogUtils.makeLogTag;

/**
 * 作者：zhouXJ on 2016/4/11 11:36
 */
public class DownlaodFile {
    private String TAG = makeLogTag(DownlaodFile.class);

    private static final int DOWN_NOSDCARD = 0;
    private static final int DOWN_UPDATE = 1;
    private static final int DOWN_OVER = 2;
    private static final int DIALOG_TYPE_LATEST = 0;
    private static final int DIALOG_TYPE_FAIL = 1;

    private static DownlaodFile downlaodFile;

    private Context mContext;
    // 通知对话框
    private Dialog noticeDialog;
    // 下载对话框
    private Dialog downloadDialog;
    // 进度条
    private ProgressBar mProgress;
    // 显示下载数值
    private TextView mProgressText;
    // 查询动画
    private ProgressDialog mProDialog;
    // 进度值
    private int progress;
    // 下载线程
    private Thread downLoadThread;
    // 终止标记
    private boolean interceptFlag;
    // 提示语
    private String updateMsg = "确定下载此文件吗？";
    // 返回的安装包url
    private String apkUrl = "";
    // 下载包保存路径
    private String savePath = "";
    // apk保存完整路径
    private String apkFilePath = "";
    // 临时下载文件路径
    private String tmpFilePath = "";
    // 下载文件大小
    private String apkFileSize;
    // 已下载文件大小
    private String tmpFileSize;

    private String suffixName;
    private String fileName;
    private String fileUrl;

    //单利模式

    public static DownlaodFile getUpdateManager() {
        if (downlaodFile == null) {
            downlaodFile = new DownlaodFile();
        }
        downlaodFile.interceptFlag = false;
        return downlaodFile;
    }

    private Handler mHandler = new Handler() {
        public void handleMessage(Message msg) {
            switch (msg.what) {
                case DOWN_UPDATE:
                    mProgress.setProgress(progress);
                    mProgressText.setText(tmpFileSize + "/" + apkFileSize);
                    break;
                case DOWN_OVER:
                    downloadDialog.dismiss();
                    openFile(mContext, apkFilePath, suffixName);
                    break;
                case DOWN_NOSDCARD:
                    downloadDialog.dismiss();
                    Toast.makeText(mContext, "无法下载文件，请检查SD卡是否挂载", Toast.LENGTH_SHORT).show();
                    break;
            }
        }

    };


    /**
     * 检查App更新
     *
     * @param context
     */
    public void checkAppUpdate(Context context, String url, String fileName, String suffixName) {
        this.mContext = context;
        this.fileUrl = url;
        this.fileName = fileName;
        this.suffixName = suffixName;

        showNoticeDialog();
    }

    /**
     * 显示版本更新通知对话框
     */
    private void showNoticeDialog() {
        AlertDialog.Builder builder = new AlertDialog.Builder(mContext);
        builder.setTitle("文件下载");
        builder.setMessage(updateMsg);
        builder.setPositiveButton("下载", new DialogInterface.OnClickListener() {
            @Override
            public void onClick(DialogInterface dialog, int which) {
                dialog.dismiss();
                showDownloadDialog();
            }
        });
        builder.setNegativeButton("取消", new DialogInterface.OnClickListener() {
            @Override
            public void onClick(DialogInterface dialog, int which) {
                dialog.dismiss();
            }
        });
        noticeDialog = builder.create();
        noticeDialog.setCanceledOnTouchOutside(false);
        noticeDialog.show();
    }

    /**
     * 打开文件提示框
     */
    public void showOpenFileDialog(final Context context, final String filePath, final String suffixName) {
        AlertDialog.Builder builder = new AlertDialog.Builder(context);
        builder.setTitle("提示");
        builder.setMessage("文件已下载，是否现在打开?");
        builder.setPositiveButton("确定", new DialogInterface.OnClickListener() {
            @Override
            public void onClick(DialogInterface dialog, int which) {
                dialog.dismiss();
                openFile(context, filePath, suffixName);
            }
        });
        builder.setNegativeButton("取消", new DialogInterface.OnClickListener() {
            @Override
            public void onClick(DialogInterface dialog, int which) {
                dialog.dismiss();
            }
        });
        Dialog openFileDialog = builder.create();
        openFileDialog.setCanceledOnTouchOutside(false);
        openFileDialog.show();
    }

    /**
     * 显示下载对话框
     */
    private void showDownloadDialog() {
        AlertDialog.Builder builder = new AlertDialog.Builder(mContext);
        builder.setTitle("正在下载");

        final LayoutInflater inflater = LayoutInflater.from(mContext);
        View v = inflater.inflate(R.layout.app_update, null);
        mProgress = (ProgressBar) v.findViewById(R.id.update_progress);
        mProgressText = (TextView) v.findViewById(R.id.update_progress_text);

        builder.setView(v);
        builder.setNegativeButton("取消", new DialogInterface.OnClickListener() {
            @Override
            public void onClick(DialogInterface dialog, int which) {
                dialog.dismiss();
                interceptFlag = true;
                File file = new File(apkFilePath);

                // 手动取消  删除未下载完的文件
                if (file.exists()) {
                    file.delete();
                }
            }
        });
        builder.setOnCancelListener(new DialogInterface.OnCancelListener() {
            @Override
            public void onCancel(DialogInterface dialog) {
                dialog.dismiss();
                interceptFlag = true;
            }
        });
        downloadDialog = builder.create();
        downloadDialog.setCanceledOnTouchOutside(false);
        downloadDialog.show();

        downloadApk();
    }


    private Runnable mdownApkRunnable = new Runnable() {
        @Override
        public void run() {
            try {
                String apkName = "xudowapp_" + fileName; //+ ".suffixName"
                String tmpApk = "xudowapp_" + fileName;

                // 判断是否挂载了SD卡
                String storageState = Environment.getExternalStorageState();
                if (storageState.equals(Environment.MEDIA_MOUNTED)) {
                    savePath = Config.SDCARD_ROOT_DIR + "/update/";
                    File file = new File(savePath);
                    if (!file.exists()) {
                        file.mkdirs();
                    }
                    apkFilePath = savePath + apkName;
                    tmpFilePath = savePath + tmpApk;
                }

                // 没有挂载SD卡，无法下载文件
                if (apkFilePath == null || apkFilePath == "") {
                    mHandler.sendEmptyMessage(DOWN_NOSDCARD);
                    return;
                }



                File ApkFile = new File(apkFilePath);

                // 是否已下载更新文件
                if (ApkFile.exists()) {
                    downloadDialog.dismiss();
                    openFile(mContext, apkFilePath, suffixName);
                    return;
                }

                // 输出临时下载文件
                File tmpFile = new File(tmpFilePath);
                FileOutputStream fos = new FileOutputStream(tmpFile);

                URL url = new URL(fileUrl);
                LOGE("zxj", "fileUrl= " + fileUrl);
                HttpURLConnection conn = (HttpURLConnection) url
                        .openConnection();
                conn.setRequestProperty("Accept-Encoding", "identity");
                String ss = conn.getHeaderField("Content-Length");
                Log.e("zxj", "ss  = " + ss);
                int length = conn.getContentLength();
                conn.connect();
                InputStream is = conn.getInputStream();
//                int length = is.available();

                // 显示文件大小格式：2个小数点显示
                DecimalFormat df = new DecimalFormat("0.00");
                // 进度条下面显示的总文件大小
                if (length < 0) {
                    apkFileSize = "无法获取文件大小";
                } else {
                    apkFileSize = df.format((float) length / 1024 / 1024) + "MB";
                }


                int count = 0;
                byte buf[] = new byte[1024];

                do {
                    int numread = is.read(buf);
                    count += numread;
                    // 进度条下面显示的当前下载文件大小
                    tmpFileSize = df.format((float) count / 1024 / 1024) + "MB";
                    // 当前进度值
                    progress = (int) (((float) count / length) * 100);
                    // 更新进度
                    mHandler.sendEmptyMessage(DOWN_UPDATE);
                    if (numread <= 0) {
                        // 下载完成 - 将临时下载文件转成APK文件
                        if (tmpFile.renameTo(ApkFile)) {
                            // 通知安装
                            mHandler.sendEmptyMessage(DOWN_OVER);
                        }
                        break;
                    }
                    fos.write(buf, 0, numread);
                } while (!interceptFlag);// 点击取消就停止下载

                fos.close();
                is.close();
            } catch (MalformedURLException e) {
                e.printStackTrace();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    };

    /**
     * 下载文件
     */
    private void downloadApk() {
        downLoadThread = new Thread(mdownApkRunnable);
        downLoadThread.start();
    }

    /**
     * 打开文件
     */
    public void openFile(Context context, String filePath, String suffixName) {
        File apkfile = new File(filePath);
        if (!apkfile.exists()) {
            return;
        }

        if (TextUtils.isEmpty(suffixName)) {
            return;
        }

        if (context == null) {
            return;
        }

        if (suffixName.equals("docx") || suffixName.equals("doc")) { // word文档
            OpenFile.openWord(context, filePath);

        } else if (suffixName.equals("pdf")) { // pdf
            OpenFile.openPDF(context, filePath);

        } else if (suffixName.equals("xlsx") || suffixName.equals("xls")) { // xlsx
            OpenFile.openExcel(context, filePath);

        } else if (suffixName.equals("jpeg") || suffixName.equals("jpg") || suffixName.equals("gif") ||
                suffixName.equals("png") || suffixName.equals("x-ms-bmp")) { // 图片
            OpenFile.openImg(context, filePath);

        } else if (suffixName.equals("pptx") || suffixName.equals("ppt")) { // ppt
            OpenFile.openPPT(context, filePath);
        }

    }
}
